Spring MVC Controller参数接收方式

SpringMvc 中参数有多种接收方式：@RequestBody @RequestParam @RequestHeader @PathVariable etc.
下面详细测试，各种参数接收方式适合的场景

2. // Content-Type application/x-www-form-urlencoded
3. // Accept */*
4. // Accept-Encoding gzip, deflate, br
5. // Accept-Language zh-CN,zh;q=0.8,en;q=0.6
6. // param1=param1¶m2=param2
7. @RequestMapping("test/testParam1")
8. @ResponseBody
9. public String testParam1(HttpServletRequest request, String param1, String param2){
10. Map<String, String> result = new HashMap<String, String>();
11. result.put("param1", param1);
12. result.put("param2", param2);
13. return JSON.toJSONString(result);
14. }
17. // Content-Type application/x-www-form-urlencoded
18. // Accept */*
19. // Accept-Encoding gzip, deflate, br
20. // Accept-Language zh-CN,zh;q=0.8,en;q=0.6
21. // param1=param1¶m2=param2
22. // 操作正常但是用RAW的方式请求，就会给出Required String parameter 'param1' is not present的异常
23. // 原因是请求里面Content-Type: application/json 而不是 application/x-www-form-urlencoded
24. // 参数的形式是一个json字符串，requestparam 无法解析
26. @RequestMapping("test/testRequestParam")
27. @ResponseBody
28. public String testRequestParam(@RequestParam String param1, @RequestParam String param2){
29. Map<String, String> result = new HashMap<String, String>();
30. result.put("param1", param1);
31. result.put("param2", param2);
32. return JSON.toJSONString(result);
33. }
36. // Content-Type: application/json
37. //如果用requestbody的形式接收，请求体里面所有的所有内容会绑定到param1中
38. //可以看一下
40. @RequestMapping("test/testRequestBody")
41. @ResponseBody
42. public String testRequestBody(@RequestBody String param1){
43. Map<String, String> result = new HashMap<String, String>();
44. result.put("param1", param1);
45. return JSON.toJSONString(result);
46. }
48. @RequestMapping("test/testRequestbodyMap")
49. @ResponseBody
50. public String testRequestbodyMap(@RequestBody Map map){
51. Map<String, Object> result = new HashMap<String, Object>();
52. result.put("param1", map.get("param1"));
53. return JSON.toJSONString(result);
54. }
56. //匹配路径，作为参数
57. @RequestMapping("test/{param1}/{param2}")
58. @ResponseBody
59. public String testPathVariable(@PathVariable String param1, @PathVariable String param2){
60. Map<String, String> result = new HashMap<String, String>();
61. result.put("param1", param1);
62. result.put("param2", param2);
63. return JSON.toJSONString(result);
64. }
66. // param2: parameter2
67. // param1: parameter1
68. // Content-Type: application/json
69. // Accept: */*
70. // Accept-Encoding: gzip, deflate, br
71. // Accept-Language: zh-CN,zh;q=0.8,en;q=0.6
73. @RequestMapping("test/testRequestHeader")
74. @ResponseBody
75. public String testRequestHeader(@RequestHeader String param1, @RequestHeader String param2){
76. Map<String, String> result = new HashMap<String, String>();
77. result.put("param1", param1);
78. result.put("param2", param2);
79. return JSON.toJSONString(result);
80. }
82. // Content-Type: application/json
83. // Accept: */*
84. // Accept-Encoding: gzip, deflate, br
85. // Accept-Language: zh-CN,zh;q=0.8,en;q=0.6
86. // Cookie: JSESSIONID=1231; Hm_lvt_82116c626a8d504a5c0675073362ef6f=1491372429
87. @RequestMapping("test/testCookieValue")
88. @ResponseBody
89. public String testCookieValue(@CookieValue(value = "JSESSIONID") String param1){
90. Map<String, String> result = new HashMap<String, String>();
91. result.put("param1", param1);
92. return JSON.toJSONString(result);
93. }